Quote from Millarart.
"though saying that i think in a few cases unless theres more than one of the same colourway with a label stating the same code then how do you know its the correct code for that colourway as in the past myself and am sure most of us owns or has came across a labeled piece with the wrong colour code on it,"
With my research into colour codes, I only designate a colour code if the label has a colour code, with the some proviso, the label is not fake, the shape and size codes corresponds with the Monart catalogue.
If two labeled piece with a different colour scheme but the same colour code came to light further investigation would be required.
The images below is a case where I have not as yet designated a colour code of 391 to this particular colour scheme. The bowl is shape MA, though on the label it has written 4/25(I think it is 4), the size code (V11) on the label does not correspond with the Monart catalogue. This piece is from Perth museum collection.
The picture is free to use by anyone.
Thanks Keith if possible could you post or email me a photo of vase, so I can document them together.